When Teemo Strategist triggers on attack and reveals cards that deal damage, can you play Stupefy as a reaction before the Teemo damage resolves to reduce the target's HP first?

Ruling: You cannot react once you have started resolving a card or ability. However, if you deal damage to a unit and then reduce its Might to or below the damage it has taken, it will die.

Sequence:

• Teemo's ability begins resolving when you choose to reveal cards
• You cannot play Stupefy during this resolution
• After Teemo's ability fully resolves, you could play Stupefy
• A unit with damage equal to or greater than its current Might will die

Nuances:

• Damage and Might are tracked separately - a unit retains its Might value even with damage on it
• A unit dies when it takes additional damage OR has its Might reduced to or below existing damage
• Damage heals at end of combat and end of turn
• A damaged unit still deals damage equal to its full Might value in combat